JPH062409B2 - Automatic type wheel mounting device for typewriter - Google Patents

Description

Detailed Description of the Invention a. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for automatically mounting a petal type character wheel rotatably housed in a case together with the case at a predetermined position of a drive shaft of a drive motor. It is used for a typewriter that prints using a wheel.

B. 2. Description of the Related Art Japanese Unexamined Patent Application Publication No. Sho 53-54 discloses a typewriter attachment / detachment device for attaching a typewheel storage cassette storing typewheels to a typewriter body as it is.
-120921, JP-A-55-27290 and JP-A-56-144969.

C. DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention In such a conventional typewriter, the type wheel can be automatically replaced and mounted, and the trouble of manually mounting the type wheel is eliminated.
An object of the present invention is to provide an automatic type wheel mounting device for a typewriter that prevents the type wheel from being damaged and soiled during the mounting operation.

D. Means for Solving the Problems An automatic type wheel mounting device in a typewriter according to the present invention is a platen that accommodates a plurality of type wheels in a carrier movably mounted in the axial direction of the platen. Placed movably in the direction orthogonal to the axis of
In a typewriter that selects a desired type wheel from this housing, moves it to the printing position, and then prints with a printing hammer, a drive that is provided on the base of the carrier and that engages with the boss hole of the type wheel. A drive motor for a type wheel having a shaft and a bullet plate having an engaging element that engages with an engagement hole of the type wheel, and the type wheel is rotatably housed in a type case and is housed together with this case in a housing case. , An engaging portion is provided in a part of the case, and an engaging body that engages with the engaging portion is provided, and the engaging body is engaged with the engaging portion to position the type wheel from the housing to a position facing the drive motor. A type wheel moving means for moving, a moving means for moving the drive shaft and the engaging element so as to engage with a boss hole and an engaging hole of the type wheel moved to a position facing the drive motor, and a spring means. Type hoi A projection that is urged toward the lever and weaker than the urging force of the engagement element due to the elasticity of the bullet plate to engage with the engagement hole of the type wheel, and is provided at a position facing the drive motor, When the type wheel is mounted on the drive motor, the type wheel stop means is provided on the carrier so that the protrusion faces the type wheel from the opposite direction to the drive motor and the protrusion is engaged with the engagement hole of the type wheel. After moving the drive motor and the type wheel stop means toward the type wheel and rotating the drive motor once,
It is characterized in that the type wheel stopping means is moved to a position not engaged with the type wheel.

E. The embodiment will be described in detail with reference to an embodiment shown in the drawings. Reference numeral 1 denotes a platen, which is rotatably mounted on a conventionally known machine base (not shown). 2 is a carrier, and this carrier 2 is also mounted on the machine base so as to slide in the left-right direction in FIG. 3 is a petal type character wheel, and this petal type character wheel is provided at the tip of the free piece in which the character portion 4 is radially formed. Reference numeral 5 denotes the boss, 5'is an engaging hole formed at a predetermined position (home position) of the boss 5, 6 is the boss hole, and 7 is an engaging bullet provided from the boss 5 toward the boss hole 6. The line 8 is a case for storing the petal type wheel 3, and the case has a substantially cross section. Boss 10 having a boss hole 9 and a notch 11 continuous with the boss hole 9, and a cross section of the boss 10 that is formed in a truncated and truncated shape. Formed in the carrier 2 at a substantially central portion of the upper edge, and a notch 14 for entering the printing hammer 13, operating knobs 15 and 16 on both sides of the notch 14, and a boss hole at a substantially central portion. The petal type wheel 3 includes a boss 18 provided with a boss 17 and a back side plate 21 provided with a pair of notches 19 and 20 for engaging at both side edges of the boss hole 17 on the substantially center line. By engaging 5 with the boss hole 9 of the positive side plate 12 and integrating the back side plate 21 and the positive side plate 12, the petal type character wheel 3 is provided between the positive side plate 12 and the back side plate 21. It is freely rotatable in the formed storage groove 22 and is housed in the case 8 so as not to fall off. Reference numeral 23 denotes a housing case that houses a plurality of cases 8 in which the petal type character wheels 3 are housed.
The upper part of the case 8 is open, and a plurality of cases 8 in which the petal type wheel 3 is housed are housed in the space 24 so as to be movable upward. Reference numeral 25 denotes an accommodation stand of the accommodation case 23, and the accommodation stand 25 is provided with a shaft 26 provided on the carrier 2, a pulse motor 27, a gear group 28, a rack 29 provided on the accommodation stand 25, and the like. And is mounted on the carrier 2 so as to move in the left-right direction in FIG. Therefore, this storage base 2
The housing 5 for housing the plurality of cases 8 in which the petal type wheels 3 are housed is mounted on 5 and the pulse motor 2 is operated by a control signal from a computer (not shown).
By rotating 7 to move the storage cabinet 23 together with the storage stand 25, it is possible to position the desired petal type wheel 3 among a plurality of petal type wheels 3 together with the case 8 at a predetermined position which will be described in detail later. You can do it. Reference numeral 30 denotes a drive motor for the petal type character wheel 3, and the drive motor 30 has engaging ears 31, 31 'and 32, 32' which are provided at four corners and project outward, and In a state in which a part of the drive motor 30 is located below the hole 33 of the base 36 having a hole 33 for accommodating the drive motor 30 in the central portion and a mounting portion 34 formed by bending upward. The drive motor 30 is provided on the base 36 by screwing 35 to the mounting portion 34, and the ear portions 31, 3 of the base 36 are mounted.
1'and 32,32 'are side plates 37,3 of the carrier 2
A pair of long holes 38, 38 'for guiding formed in the upper end of 7'
The long holes 38, 38 'and the ears 31, 3,
Guided by the engagement of 1'and 32,32 ', the carrier 2
On the other hand, the drive motor 30 is mounted together with the base 36 so as to move in the left-right direction in FIG. 39 is a drive shaft of the drive motor 30, 40 is an operating piece fixed to the rear end (left end in FIG. 1) of the drive shaft 39, and 41 is a sensor provided on the platform 36. When the operating piece 40 is located on the sensor 41, the drive shaft 39
The predetermined position (home position) is detected and the signal is transmitted. Reference numeral 42 denotes a motor for moving the drive motor 30 (hence, the base 36), and the motor 42 is fixed to the outside (left side in FIG. 2) of the side plate 37 of the carrier 2 via a mounting bracket 43. There is. Four
4 is a cam board, one side of which is a gear 45 for conduction.
However, on the other side (right side in FIG. 2), the groove cam 4
6 are provided respectively, and projections 47 for engagement are provided in a protruding manner on a part of the outer peripheral portion thereof. The cam board 44 is attached to the inside of the side plate 37 (on the right side in FIG. 2) by the shaft 4
It is mounted so that it can be freely rotated by 8, and this cam board 4
4 and the motor 42 are associated with each other through a gear 49 provided on a rotation shaft 42 'thereof and the gear 45, and the cam disc 44 can be rotated by the rotation of the motor 42. You can do it. 50 is a crank,
At one end of the crank 50, a groove cam of the cam board 44 is provided.
The pin 51 that engages with 46 is provided in a protruding manner, and at the other end,
A notch 52 for engagement is provided. The crank 50 has one end (in FIG. 2) of a rotary shaft 53 mounted between the side plates 37 and 37 'of the carrier 2 with the pin 51 engaged with the groove cam 46. It is screwed 54 near the left end). 55 is a swing rod, and one end of the swing rod 55 is screwed 56 near the other end ((the right end in FIG. 2) of the rotary shaft 53, and the swing rod 55 is A notch 57 for engagement is formed at the other end of the groove 58. 58 '.
Are a pair of pins for engagement, and these pins are formed by bending part of side edges of a substantially central portion of the base 36 in the front-rear direction upward (toward the front in FIG. 1). A pair of ears 59, 59 'are provided so as to project outward, and a pin 58 is provided in a notch 52 of the crank 50, and a pin 58' is provided in a notch 57 of the swing rod 55. It is engaged. Therefore, the gear 4 by the rotation of the motor 42
Groove cam 4 by rotation of the cam board 44 via 9 and 45
The crank 50 is swung by the engagement of the pin 6 and the pin 51, and the swing of the crank 50 and the swing rod 55 through the swing shaft 53 by the swing together with the base 36. The drive motor 30 can be moved in the left-right direction in FIG. Further, the drive motor 3
No. 0 drive shaft 39 at the front end (the right end in FIG. 1), an annular groove 60 that engages with the elastic line 7 of the boss hole 6 of the petal type character wheel 3, and a predetermined position of the drive shaft 39 ( A disc portion 62 having a notch 61 at a position corresponding to a home position) is formed in that order from a front end portion toward a rear end portion, and a rear side surface of the disc portion 62 (see FIG. 1). On the left side surface), a bullet plate 64 having an engaging element 63 is inserted through the notch 61, and the bullet plate 64 is ejected from the right side surface (the right side surface in FIG. 1) of the disk portion 62. The plate 64 is fixed by a screw 65 so as to project due to its elasticity. 66 is a partition plate, 6
7 is a notch formed in the upper part (front part in FIG. 1) of the center of the partition plate 66 in the left-right direction (left-right direction in FIG. 1), and this notch 67 is located above (first part). (Front part in the figure)
The partition plate 66 is located slightly ahead of the drive shaft 39 of the drive motor 30 and is fixed between the side plates 37 and 37 ′ of the carrier 2 in a state in which the partition plate 66 is positioned toward the drive shaft 39. Reference numeral 68 denotes a partition metal fitting having an L-shaped cross section, and the partition metal fitting 68 has a petal type character wheel 3 housed in the case 8 between the upright portion 69 and the partition plate 66. Leaving a gap that can pass with
A predetermined position (home position) of the engagement element 63 provided on the drive shaft 39 of the drive motor 30 of the upright portion 69 of the carrier 2, which is fixedly provided between the side plates 37 and 37 '. A hole 70 is formed at a position facing each other. Reference numeral 71 is an engaging pin erected on one side near the front side portion of the base 36 (left side near the front side portion in FIG. 2), and 72 is a first swinging rod. Rocking rod 7
2 is mounted on a shaft 74 that is planted near the left end of the horizontal plane portion 73 of the partition fitting 68 in FIG.
The tension of a spring 76 stretched between the spring hook 75 and the side plate 37 of the carrier 2 always urges it to swing toward one side (counterclockwise in FIG. 2). In addition to the above, not only is an engaging protrusion 77 formed by bending downward (backward of the paper in FIG. 2) projecting at one end, but the other end below the one end It is inserted through the long hole 38 ″ of the side plate 37 of the carrier 2 and engages with the pin 71 of the base 36. The other end of the actuating rod 79 having the engagement portion 78 of the shape is attached to the shaft 80. Reference numeral 81 denotes a second swing rod, and the second swing rod 81 is mounted on the shaft 74 in a state of being positioned below the first swing rod 72 (paper spine side in FIG. 2). The spring hook 82 and the partition metal fitting 68 are
Is constantly urged to swing toward one side (clockwise direction in FIG. 2) by the tension of a spring 84 stretched between a spring hook 83 planted on the horizontal plane portion 73 of FIG. In addition to the protrusion 85 for engagement protruding at one end, the other end is mounted on the rotary shaft 53 whose one end engages with the protrusion 47 of the cam disc 44. By inserting the long hole 38 '' of the side plate 37 of the swing rod 86,
It is connected to the other end located on the outside through a connecting rod 87. The second swing rod 81 swings the swing rod 86 due to the engagement of the protrusion 47 of the cam board 44 and the one end of the swing rod 86, whereby the spring 84 is attached via the connecting rod 87. It can be rocked against the force. Further, the tension of the spring 76 for urging the first oscillating rod 72 is made stronger than the tension of the spring 84 for urging the second oscillating rod 81, and the tension of the spring 76 causes the first oscillating rod 72 to move. Via the protrusion 77, the second swing rod 81 is resisted against the bias of the spring 84, and the second swing rod 81 is pressed.
The protrusion 88 provided on one side (front side in FIG. 2) can be rocked until it abuts against and is received by the spring hook 83, and the first rocking rod 72 is When the second swing rod 81 is swung against the bias of the spring 76, the tension of the spring 84 causes the second swing rod 81 to move.
The first swing rod 72 swings following the swing of the first swing rod 72. Reference numerals 89 and 90 denote a pair of rocking rods provided on both side plates 37 and 37 'of the carrier 2, respectively.
By the swing of 9, 90, the long holes 9 drilled at one end of each
A pair of notches 19 of the case 8 which are mounted on 1, 92,
Engagement body 9 with projections 93, 94 that engage with 20, respectively
One of the petal type wheel 3 in the housing 23, which is moved to a predetermined position of the carrier 2 via 5, 96, and the boss hole 6 thereof faces the drive shaft 39 of the drive motor 30 at a predetermined position. In addition, it can be moved upward together with the case 8 to be positioned, or can be moved back toward the housing 23.

1 and 2 show the petal type wheel 3 in the housing 23.
One of the cases 8 has its boss hole 6 at a predetermined position facing the drive shaft 39 of the drive motor 30, that is, a printing position.
Besides, the drive shaft 39 is stopped at a predetermined position (home position) because the operating piece 40 is at the position of the sensor 41, and the petal type wheel 3 is not mounted on the drive shaft 39. It is in a state. In this state, the motor 4 according to a control signal from a computer (not shown)
The second rotation shaft 42 'is rotated, and the rotation of the cam plate 44 by the rotation causes the crank 50 to swing and the swing rod 55 to swing via the rotation shaft 53, thereby causing the base plate to swing. The drive motor 30 is moved together with the drive shaft 39 toward the petal type character wheel 3 together with 36, and the annular groove 60 of the drive shaft 39 is engaged with the elastic line 7 of the boss hole 6 of the petal type character wheel 3. As a result of the pin 71 of the base 36 engaging the engaging portion 78 of the starting rod 79 and causing the first swinging rod 72 to swing via the starting rod 79 against the bias of the spring 76, As described above, the second swing rod 81 is swung by the tension of the spring 84, and the projection 85 is inserted through the hole 70 of the partition metal fitting 68 and the notch 11 of the case, so that the boss 5 of the petal type wheel 3 is formed. Engage with. At that time, when the engagement hole 5'of the petal type character wheel 3 is at a predetermined position (home position) of the drive shaft 39, the projection 85 engages with the engagement hole 5'and the petal type character is located at that position. At the same time that the wheel 3 is stopped temporarily, the elastic force of the bullet plate 64 causes the engaging element 63 to engage with the engaging hole 5'of the petal type character wheel 3 in place of the projection 85, thereby allowing the petal to the drive shaft 39. Since the pattern type wheel 3 is to be mounted, the projection 85 is stopped at a position where the engagement is disengaged from the engagement hole 5 ′ by the engagement element 63, and the projection 47 is stopped by the subsequent rotation of the cam disk 44 by the motor 42. Of the second swing rod 8 via the connecting rod 87.
1 together with its protrusion 85 is moved back against the tension of the spring 84. (See FIGS. 10 and 11) Further, when the petal type character wheel 3 is not located at the above-mentioned position, the projection 85 of the second swing rod 81 has the boss 5 of the petal type character wheel 3. When the petal-type character wheel 3 is in contact with the surface of the petal-type character wheel 3 by the tension of the spring 84, the engaging element 63 of the bullet plate 64 and the rear surface of the boss 5 of the petal-type character wheel 3 are frictionally engaged with each other. , The engaging hole 5'of the petal type character wheel 3 is in the middle of being rotated once in the direction shown by the arrow in FIG. When the position of the projection 85 of 81 and thus the position opposite to the predetermined position (home position) of the drive shaft 39 is reached, the second swing rod 81 is swung by the tension of the spring 84 and the projection 85 is engaged with the engaging hole. Engage 5'and temporarily stop petal type wheel 3 at that position It occupies. Then, the drive shaft 39 rotates to that position and the sensor 41
Stop at the detection signal, and at the same time, the engaging element 6 of the bullet plate 64
3 collides with the protrusion 85 of the second swing rod 81 due to the elasticity of the bullet plate 64 and swings the second swing rod 81 against the bias of the spring 84, and the protrusion 85 is formed into a petal shape. Type wheel 3
The engaging hole 5'is disengaged from the engaging hole 5'and engages with the engaging hole 5 ', so that the drive shaft 39 is at a predetermined position (home position).
Attach the petal type print wheel to. (FIGS. 6 to 9 show the state between them.) Subsequent motor 4
When the cam board 44 is rotated by 2, the protrusion 47 is swung.
As described above, the second swing rod 81 is moved back by engaging with 6. (FIG. 10 and FIG. 11 show the state.) Then, by rotating the motor 42 in the opposite direction, each part operates in the opposite direction, and the drive shaft 39 causes the petal. The mounting of the type printing wheel 3 can be released.

F. As described above, according to the present invention, the housing is moved in the direction orthogonal to the axial direction of the platen to select the type wheel from the housing, and the engagement provided on a part of the case of the type wheel is performed. By engaging the portion and the engagement body of the type wheel moving means, moving the type wheel to a position facing the drive motor, moving the drive motor and the type wheel stop means toward the type wheel, and rotating the moving motor once. First, even if the drive shaft and the engaging element of the drive motor are not engaged with the boss hole and the engagement hole of the type wheel, the type wheel rotates with the drive shaft due to the friction between the drive shaft and the projection of the bullet plate and the type wheel. Then, if the projection of the type wheel stop means engages with the engagement hole of the type wheel during its rotation, the type wheel is temporarily stopped at that position, while the drive shaft rotates as it is. The engagement element can be reliably engaged with the engagement hole of the type wheel (the engagement of the engagement element with the engagement hole is caused by the protrusion of the type wheel stop means by the elastic force of the engagement element. By releasing the engagement state with the engagement hole against the biasing force of the means), after this, since the type wheel stopping means is separated from the type wheel, a desired type wheel among the plurality of type wheels of the housing is selected. The type wheel can be automatically selected, and even if the position of the engagement hole of the type wheel in the case does not match the position of the engaging element of the drive motor, it can be automatically fitted to the drive motor by matching it. Since the type wheel stopping means is separated from the type wheel, it does not hinder the rotation of the type wheel during printing, which is extremely convenient.In addition, it is troublesome to manually install the drive shaft of the petal type wheel, which has been done manually. Nature Not only can be wiped out,
Since the petal type wheel is mounted in the case, it is not damaged or contaminated.

[Brief description of drawings]

The drawings are embodiments of the present invention, in which FIG. 1 is a partial side view with a part cut away, FIG. 2 is a plan view of the same, and FIG.
The figure is also a front view, FIG. 4 is a side view, FIG. 5 is a plan view showing a different operating state from FIG. 2, FIG. 6 is a partial side sectional view, and FIG. 6 is a rear view, FIG. 8 is a side sectional view of a part shown in an operating state different from FIG. 6, FIG. 9 is a rear view of a part shown in an operating state different from FIG. 7, and FIG. FIG. 4 is a partial side view showing an operating state different from FIG. 4, and FIG. 11 is a partial plan view showing an operating state different from FIG. 1 --- platen, 2--carrier, 3--petal type wheel, 4--type part, 5--boss, 5 '
--- Engagement hole, 6 --- Boss hole, 7 --- Bullet line, 8--
-Case, 9 --- Boss hole, 10 --- Boss, 11 ---
-Notch, 12 --- Side plate, 13 --- Print hammer,
14 --- notch, 15,16 --- knife, 17 --- boss hole, 18 --- boss, 19,20 --- pair of notches,
21 --- back side plate, 22 --- accommodating groove, 23 --- accommodating housing, 24--space of accommodating housing 23, 25 --- accommodating base,
26 --- axis, 27 --- pulse motor, 28 --- gear group, 29 --- rack, 30 --- drive motor, 3
1, 31 ', 32, 32' --- ear, 33 --- hole,
34 --- Mounting part, 35 --- screw, 36 ---
Base, 37, 37 '-Both sides of the carrier 2, 38,
38 '--- long hole, 39 --- drive shaft, 40 --- actuator, 41 --- sensor, 42 --- motor, 42'-
--- Rotating shaft of motor 42, 43 --- Mounting bracket, 44-
--- Cam disk 45 --- Gear, 46 --- Groove cam, 47-
--- Protrusion, 48 --- shaft, 49 --- gear, 50 ---
Crank, 51 --- pin, 52 --- notch, 53 ---
-Rotation axis, 54 --- Screw fastening, 55 --- Swing rod, 5
6 --- Screw fastening, 57 --- notch, 58, 58 '---
-A pair of pins, 59,59'-One ear, 60-
-Annular groove, 61 --- notch, 62 --- disk part, 63-
--- Engagement element, 64-- bullet plate, 65 --- screw, 66-
--- Partition plate 67 --- Notch, 68 --- Partition fitting, 69
--- Standing part, 70 --- hole, 71 --- pin, 72-
--- First swing rod, 73 --- Horizontal part of the partition metal fitting 68,
74 --- Axis, 75 --- Spring Hook, 76 ---
Spring, 77 --- projection, 78 --- engagement part, 79
--- Starting rod, 80-axis, 81 --- second swing rod,
82 --- Spring hook, 83 --- Spring hook, 84 --- Spring, 85 --- Protrusion, 86 ---
-Swing rod, 87 --- Link rod, 88 --- Stem, 89, 9
0 --- oscillating rod, 91,92 --- long hole, 93,94-
--- Protrusion, 95, 96 --- engagement body.

Claims (1)

[Claims] 1. A housing, which accommodates a plurality of type wheels, is movably mounted on a carrier movably mounted in the axial direction of the platen in a direction orthogonal to the axial direction of the platen. Select the desired type wheel from the housing,
In a typewriter for moving to a printing position and then printing with a printing hammer, a drive shaft (39) provided on a base (36) on a carrier and engaging with a boss hole (6) of a type wheel, and a type wheel. Drive motor (3) for a type wheel having a bullet plate (64) having an engaging element (63) for engaging with the engaging hole (5 ') of
0) and the type wheel are rotatably housed in the type case and are housed together with the case in the housing case, and the engaging portion (1
9 and 20), and an engaging body (9
No. 5,96), a type wheel moving means for engaging the engaging body with the engaging portion to move the type wheel from the housing to a position facing the drive motor, and the drive shaft and the engaging element with the drive motor. Moving means for moving so as to engage with the boss hole and the engaging hole of the type wheel that has been moved to the opposite position; It has a protrusion (85) that is biased by a force weaker than the biasing force and that engages with the engagement hole of the type wheel, and is provided at a position facing the drive motor. Provided is a type wheel stopping means that is provided on the carrier so that the projection can be engaged with the engagement hole of the type wheel, and when the type wheel is mounted on the drive motor, the drive motor and the type wheel stop are installed. The automatic mounting of the type wheel in the typewriter, characterized in that the means is moved toward the type wheel, the drive motor is rotated once, and then the type wheel stop means is moved to a position not engaged with the type wheel. apparatus.